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Finding the Fourth Proportional to 443,758.30, 665,637.45 and 128,247.10

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Solution

The fourth proportional to 443,758.30, 665,637.45 and 128,247.10 is: 192,370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,758.30 : 665,637.45 = 128,247.10 : x
  2. Step 2: Convert to fraction form
    443,758.30/665,637.45 = 128,247.10/x
  3. Step 3: Cross multiply
    443,758.30x = 665,637.45 × 128,247.10
  4. Step 4: Simplify right side
    443,758.30x = 85,366,072,613.90
  5. Step 5: Solve for x
    x = 85,366,072,613.90/443,758.30
  6. Step 6: Final answer
    x = 192,370.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.